Comments on: Grbl_ESP32 Development Board Version 3.1 http://www.buildlog.net/blog/2018/11/grbl_esp32-development-board-version-3-1/
Lasers, CNC, Digital Fabrication, Design and RelatedTue, 25 Jun 2019 21:59:30 +0000
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By: bdring http://www.buildlog.net/blog/2018/11/grbl_esp32-development-board-version-3-1/#comment-68838
Tue, 25 Jun 2019 21:59:30 +0000http://www.buildlog.net/blog/?p=3829#comment-68838That sounds like an interesting project. You would need to know the pinout of the D connector. You would also need to know if there are any optoisolators, etc that might need to driven with a specific voltage or current.

If you are interested in chatting about this and posting pictures, etc, I go do that via Slack. I will send you an invite.

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By: Doug http://www.buildlog.net/blog/2018/11/grbl_esp32-development-board-version-3-1/#comment-68828
Tue, 25 Jun 2019 19:24:11 +0000http://www.buildlog.net/blog/?p=3829#comment-68828Bart, I was about to update my 3040T running your ESP32-CNC board but found an Arduino Nano running grbl directly driving the stock driver board via the DB25. This means no access to the inside of the 3040T controller box!

While I love your board layout I’m thinking of foregoing the driver boards and jumpering to a DB25 as was done with an Arduino Nano and a Uno. I’m not afraid of getting into the box as I currently have it in pieces since I found the spindle control wire broken at the PS connector and the speed POT is intermittent. I just like the idea of not having people open their 3040 machines, being able to plug a device(esp32 running grbl-esp32) and a USB cable or wireless.

Have you done this or have any input as I start?

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By: Doug http://www.buildlog.net/blog/2018/11/grbl_esp32-development-board-version-3-1/#comment-37077
Sun, 03 Mar 2019 01:23:45 +0000http://www.buildlog.net/blog/?p=3829#comment-37077just picked up a used 3040T CNC and will be wiring up Grbl_ESP32. Has anyone blogged this that you know of? I probably can’t put it into the existing metal box but maybe will 3D print a case and move switches and E-Stop to it.
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By: bdring http://www.buildlog.net/blog/2018/11/grbl_esp32-development-board-version-3-1/#comment-34373
Mon, 18 Feb 2019 17:34:12 +0000http://www.buildlog.net/blog/?p=3829#comment-34373It can control a laser, but the PWM output is only 3.3v. You should use a level shifter to take that up to 5v.
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By: Joe http://www.buildlog.net/blog/2018/11/grbl_esp32-development-board-version-3-1/#comment-34311
Mon, 18 Feb 2019 11:42:52 +0000http://www.buildlog.net/blog/?p=3829#comment-34311Hi, can this provide pwm signal suitable for k40 laser? I saw the 2.5d version but I would like to have a z axis stepper to raise and lower the bed.
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By: bdring http://www.buildlog.net/blog/2018/11/grbl_esp32-development-board-version-3-1/#comment-32950
Thu, 07 Feb 2019 15:45:19 +0000http://www.buildlog.net/blog/?p=3829#comment-32950Could you please ask this as an issue on the github repo. The discussion will probably benefit more people that way

Thanks

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By: Ignasi http://www.buildlog.net/blog/2018/11/grbl_esp32-development-board-version-3-1/#comment-32943
Thu, 07 Feb 2019 15:03:17 +0000http://www.buildlog.net/blog/?p=3829#comment-32943Hello,
I’m trying to build a “self” working machine that runs once again the same gcode when I press a button.

I got your pcb to work using a universal GCODE sender but I would like to get rid of that computer, how could I call a gcode that’s on the SD card without the need of a computer, just by pressing the “start” button?

I’m trying to build a “self” working station, without a need to connect it to a computer to run again and again a simple gcode.

I bought your pcb, and got the program working without a single problem, but always connected to Gcode Sender.

Is there any way I can call the gcode from sd card when sending a high signal or low signal on the “Start” pin?

Thanks!

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By: bdring http://www.buildlog.net/blog/2018/11/grbl_esp32-development-board-version-3-1/#comment-32131
Thu, 24 Jan 2019 03:07:17 +0000http://www.buildlog.net/blog/?p=3829#comment-32131Yes, it is very easy. There is a cpu_map.h file where you assign the pins to the functions. Search Google for a ESP32 Dev Kit Pinout.

Do not use GPIO6-GPIO11 they are used for on board flash
Do not use GPIO1-GPIO2 they qare used for the USB/Serial
Avoid GPIO0 it is used to trigger boot mode.

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By: Anderson http://www.buildlog.net/blog/2018/11/grbl_esp32-development-board-version-3-1/#comment-32128
Wed, 23 Jan 2019 23:25:16 +0000http://www.buildlog.net/blog/?p=3829#comment-32128Hi, I will use this circuit but Iwould like to change some pins. Is it possible? I know that there are some pins reserved to use special functions.
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